Emag Eht Htiw Em Pleh Solution:

#include <bits/stdc++.h>
using namespace std;

vector<string> stringSplit(const string s, char delimiter){
   vector<string> tokens;
   string token;
   istringstream tokenStream(s);
   while (getline(tokenStream, token, delimiter)){
      tokens.push_back(token);
   }
   return tokens;
}

int main(){
    // #ifndef TESTING
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    // #endif
    string boardSeparator = "+---+---+---+---+---+---+---+---+";
    string board[8] = {"|:::|...|:::|...|:::|...|:::|...|",
                    "|...|:::|...|:::|...|:::|...|:::|",
                    "|:::|...|:::|...|:::|...|:::|...|",
                    "|...|:::|...|:::|...|:::|...|:::|",
                    "|:::|...|:::|...|:::|...|:::|...|",
                    "|...|:::|...|:::|...|:::|...|:::|",
                    "|:::|...|:::|...|:::|...|:::|...|",
                    "|...|:::|...|:::|...|:::|...|:::|"};
    string line;
    getline(cin, line);
    vector<string> pieces = stringSplit(line.substr(7), ',');
    for(string piece : pieces){
        char id = piece.length() == 3? piece[0] : 'P';
        int col = piece.length() == 3? piece[1] - 'a' : piece[0] - 'a';
        board[piece[piece.length() - 1] - '1'][col * 4 + 2] = id;
    }
    getline(cin, line);
    pieces = stringSplit(line.substr(7), ',');
    for(string piece : pieces){
        char id = piece.length() == 3? tolower(piece[0]) : 'p';
        int col = piece.length() == 3? piece[1] - 'a' : piece[0] - 'a';
        board[piece[piece.length() - 1] - '1'][col * 4 + 2] = id;
    }
    int i = 0;
    cout << boardSeparator << endl;
    for(int i = 7; i >= 0; i--){
        cout << board[i] << endl << boardSeparator << endl;
    }
    return 0;
}